lokinet/llarp/net/net_bits.hpp
Jeff 871c3e3281
changeset for windows port
* wintun vpn platform for windows
* bundle config snippets into nsis installer for exit node, keyfile persisting, reduced hops mode.
* use wintun for vpn platform
* isolate all windows platform specific code into their own compilation units and libraries
* split up internal libraries into more specific components
* rename liblokinet.a target to liblokinet-amalgum.a to elimiate ambiguity with liblokinet.so
* DNS platform for win32
* rename llarp/ev/ev_libuv.{c,h}pp to llarp/ev/libuv.{c,h}pp as the old name was idiotic
* split up net platform into win32 and posix specific compilation units
* rename lokinet_init.c to easter_eggs.cpp as that is what they are for and it does not need to be a c compilation target
* add cmake option STRIP_SYMBOLS for seperating out debug symbols for windows builds
* intercept dns traffic on all interfaces on windows using windivert and feed it into lokinet
2022-09-08 14:24:59 -04:00

54 lines
1.3 KiB
C++

#pragma once
#include "net_int.hpp"
namespace llarp
{
/// get a netmask with the higest numset bits set
constexpr huint128_t
_netmask_ipv6_bits(uint32_t numset)
{
return (128 - numset) ? (huint128_t{1} << numset) | _netmask_ipv6_bits(numset + 1)
: huint128_t{0};
}
constexpr huint128_t
netmask_ipv6_bits(uint32_t numset)
{
return _netmask_ipv6_bits(128 - numset);
}
/// get a netmask with the higest numset bits set
constexpr uint32_t
_netmask_ipv4_bits(uint32_t numset)
{
return (32 - numset) ? (1 << numset) | _netmask_ipv4_bits(numset + 1) : 0;
}
/// get a netmask given some /N range
constexpr huint32_t
netmask_ipv4_bits(uint32_t num)
{
return huint32_t{_netmask_ipv4_bits(32 - num)};
}
constexpr huint32_t
ipaddr_ipv4_bits(uint32_t a, uint32_t b, uint32_t c, uint32_t d)
{
return huint32_t{(d) | (c << 8) | (b << 16) | (a << 24)};
}
// IPv4 mapped address live at ::ffff:0:0/96
constexpr std::array<uint8_t, 12> ipv4_map_prefix{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff};
namespace net
{
inline auto
ipaddr_netmask_bits(uint32_t bits, int af)
{
if (af == AF_INET6)
return netmask_ipv6_bits(bits);
return ExpandV4(netmask_ipv4_bits(bits));
};
} // namespace net
} // namespace llarp